We found 15 dictionaries that define the word go bananas:

General (10 matching dictionaries)

1. go bananas: Merriam-Webster
2. go bananas: Oxford Learner's Dictionaries
3. go bananas: Cambridge Advanced Learner's Dictionary
4. go bananas: Wiktionary
5. go bananas: Dictionary.com
6. Go Bananas: Wikipedia, the Free Encyclopedia
7. go bananas: TheFreeDictionary.com
8. go bananas: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

9. go bananas: Financial dictionary

Computing (1 matching dictionary)

10. go bananas: Encyclopedia

Miscellaneous (1 matching dictionary)

11. go bananas: Idioms

Slang (2 matching dictionaries)

12. go bananas: ESL Slang page
13. go bananas: Urban Dictionary

Definitions from Wiktionary (go bananas) ▸ verb:  (idiomatic, informal) To get angry; to go mad. ▸ verb:  (idiomatic, informal) To become silly or excited; to go crazy. Similar: go nuts, go crazy, go mad, run mad, fly off the handle, have a fit, go ham, flip one's lid, go potty, flip out, more... Opposite: remain calm, stay composed, keep cool Phrases: go bananas over, more... ▸ Words similar to go bananas ▸ Usage examples for go bananas ▸ Idioms related to go bananas ▸ Wikipedia articles (New!) ▸ Words that often appear near go bananas ▸ Rhymes of go bananas ▸ Invented words related to go bananas